#!/usr/local/bin/tcc -run
#include <stdio.h>

int chchar(int c)
{
    int a;
    if( c >= 0x41 && c < 0x5a){
        a = c + 1;
    }else if(c == 0x5a){
        a = c - 25;
    }
    return a;
}

int main(void)
{
    int i,j;
    while ((i = getchar()) != EOF){
        j = chchar(i);
        printf("%c", j);
    }
    return 0;
}